Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Some asteroids have other asteroids orbiting them.
131
It would take more than 150 years to drive a car to the sun.
569
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
It 'snows' metal on Venus.
13
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277